* upgrade stripe module
* switch stripe api to latest version
* fix api version in tests
* start upgrading client and server
* client: switch to redirect
* implement checkout session creation for gems, start implementing webhooks
* stripe: start refactoring one time payments
* working gems and gift payments
* start adding support for subscriptions
* stripe: migrate subscriptions and fix cancelling sub
* allow upgrading group plans
* remove console.log statements
* group plans: upgrade from static page / create new one
* fix#11885, correct group plan modal title
* silence more stripe webhooks
* fix group plans redirects
* implement editing payment method
* start cleaning up code
* fix(stripe): update in-code docs, fix eslint issues
* subscriptions tests
* remove and skip old tests
* skip integration tests
* fix client build
* stripe webhooks: throw error if request fails
* subscriptions: correctly pass groupId
* remove console.log
* stripe: add unit tests for one time payments
* wip: stripe checkout tests
* stripe createCheckoutSession unit tests
* stripe createCheckoutSession unit tests
* stripe createCheckoutSession unit tests (editing card)
* fix existing webhooks tests
* add new webhooks tests
* add more webhooks tests
* fix lint
* stripe integration tests
* better error handling when retrieving customer from stripe
* client: remove unused strings and improve error handling
* payments: limit gift message length (server)
* payments: limit gift message length (client)
* fix redirects when payment is cancelled
* add back "subUpdateCard" string
* fix redirects when editing a sub card, use proper names for products, check subs when gifting
* content: add gems blocks
* gemsBlocks: include ios and android identifiers
* wip: promo code
* split common constants into multiple files
* add second promo part
* geCurrentEvent, refactor promo
* fix lint
* fix exports, use world state api
* start adding world state tests
* remove console.log
* use gems block for purchases
* remove comments
* fix most unit tests
* restore comment
* fix lint
* prevent apple/google gift tests from breaking other tests when stub is not reset
* fix unit tests, clarify tests names
* iap: use gift object when gifting gems
* allow gift object with less data
* fix iap tests, remove findById stubs
* iap: require less data from the mobile apps
* apply discounts
* add missing worldState file
* fix lint
* add test event
* start removing 20 gems option for web
* start adding support for all gems packages on web
* fix unit tests for apple, stripe and google
* amazon: support all gems blocks
* paypal: support all gems blocks
* fix payments unit tests, add tests for getGemsBlock
* web: add gems plans with discounts, update stripe
* fix amazon and paypal clients, payments success modals
* amazon pay: disabled state
* update icons, start abstracting payments buttons
* begin redesign
* redesign gems modal
* fix buttons
* fix hover color for gems modal close icon
* add key to world state current event
* extend test event length
* implement gems modals designs
* early test fall2020
* fix header banner position
* add missing files
* use iso 8601 for dates, minor ui fixes
* fix time zones
* events: fix ISO8601 format
* fix css indentation
* start abstracting banners
* refactor payments buttons
* test spooky, fix group plans box
* implement gems promo banners, refactor banners, fixes
* fix lint
* fix dates
* remove unused i18n strings
* fix stripe integration test
* fix world state integration tests
* the current active event
* add missing unit tests
* add storybook story for payments buttons component
* fix typo
* fix(stripe): correct label when gifting subscriptions
* Removed unused I18N strings from the `subscriber.json` file (locales/en)
* Remove gemsPurchaseNote and subscriptionAlreadySubscribedLeadIn from locales/en
@paglias: "They're going to be removed in an upcoming PR"
* Removed `subscriber.json`'s unused I18N strings in all other languages
* wip: better group plan cancellation
* add cancelation confirm modal
* abstract confirm modal for subs
* abstract canceled modal for subs
* working code
* add missing files
* fix text and margins
* fix(cancel modal): share css and add close icon
